| Literature DB >> 15009028 |
Carolina Martínez-López1, Esther Orozco, Tomás Sánchez, Rosa María García-Pérez, Fidel Hernández-Hernández, Mario A Rodríguez.
Abstract
The Entamoeba histolytica EhCPADH complex, formed by a cysteine proteinase (EhCP112) and an adhesin (EhADH112), is involved in adherence, phagocytosis and cytolysis. This makes this complex an attractive candidate as a vaccine against amoebiasis. Here, we produced the recombinant polypeptide EhADH243, which includes the adherence epitope detected by a monoclonal antibody against the EhCPADH complex. EhADH243 was purified, and the effect of the polypeptide on in vitro and in vivo virulence was studied. Antibodies against EhADH243 reacted with the EhCPADH complex and with the recombinant polypeptide. EhADH243 and antibodies against this polypeptide inhibited adherence, phagocytosis and destruction of cell monolayers by live trophozoites, but had little effect on cell monolayer destruction by trophozoite extracts. EhADH243 recognized a 97 kDa protein in the MDCK membrane fraction that could be a putative receptor for E. histolytica trophozoites. Hamsters immunized with EhADH243 developed humoral response against EhCPADH, and animals were partially protected from amoebic liver abscess.Entities:
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Year: 2004 PMID： 15009028 DOI： 10.1111/j.1462-5822.2004.00363.x
Source DB: PubMed Journal: Cell Microbiol ISSN： 1462-5814 Impact factor: 3.715